Theme: Jesus Christ has come to save oath breakers and liars; watch over your words, speak what is true

You shall not swear by my name falsely, and so profane the name of your God: I am the LORD. - Leviticus 19:12

If a man vows a vow to the LORD, or swears an oath to bind himself by a pledge, he shall not break his word. He shall do according to all that proceeds out of his mouth. - Numbers 30:2

For people swear by something greater than themselves, and in all their disputes an oath is final for confirmation. So when God desired to show more convincingly to the heirs of the promise the unchangeable character of his purpose, he guaranteed it with an oath, so that by two unchangeable things, in which it is impossible for God to lie, we who have fled for refuge might have strong encouragement to hold fast to the hope set before us. - Hebrews 6:16-18